Duplex power-hammer.



No. 766,861. PATENTED AUG. 9, 1904. W. W. WORD.

DUPLEX POWER HAMMER.

. APPLICATION FILED SEPT. 25. 1903. N0 MODEL.

Fig-I lil Fi V @Mww/ A/ 23 l 244%@ )een Patented AugustQ, 1904.

UNITED STATES PATENT OEEICE.

WILLIAM WV. IVORI), OF SOULSBYVILLE, CALIFORNIA.

DUPLEX yF-"OWER--HAiVllVlE-R.

SPECIFICATION forming part of Letters PatentrNo. I766,861, dated August9, 1904.

Application tiled September 25, 1903. Serial No. 174,624. (No model) Toall whom, t 'nr/nay coincer-n:

Be it known that I, WILLIAM W. W om), a citizen ot' the United States,residing at Soulsbyville, county of rI`uolumne,and State oi'Oalii'ornia, have invented certain new and useful Improvements in DuplexPower-Hammers; and I hereby declare the following to be a full, clear,and exact description of the same, reference being had to theaccompanying drawings, forming a part of this speciiication.

rIhis invention relates to certain improvements in distributingvalvesfor d upleX powerhammers operated alternately on the same work and whentwo hammers and two sets of forming-dies are required, as in the processoi' forging rock-drills, described `in Letters Patent N o. 7 31,7 28,dated .I une 23, 1903, and No. 731,727, dated June 23, 1903, forimprovements granted to me on the dates above named.

Speaking' in the singular, my improvement consistsin a throttling-valvewith a graduated port or passage to control the flow of air or steam tothe hammer-pistons,provided with an extension of the valve-rod, and apiston that when the throttling-valve is closed moves thedistributing-valves oi' the hammer-engines outward or in position toadmit air or steam to the inner ends or' the hammer-pistons, so as tohold the hammer-heads and dies clear of the work; also consists indevices to operate these throttlingvalves relatively one at a time by anoscillating pedal operated by the foot of an attendant, so he can seteither of the hammers in motion at will with varying degrees oi' forceor hold them clear of the work when required, leaving his hands free tomanipulate the work and the implements applied thereto.

he object oiI my invention is to give complete control over all therequired motions of the machinery by the foot oi an attendant, add tothe celerity of the work, prevent false or interfering action of thehammers and dies, and permit completion of the work at a single heat. Tothis end I construct devices as shown in the drawings herewith and'forming a part of this speciiication.

Figure I is a side `elevation showing the hammers and arrangement of myimproved valves and devices to operate the same; Fig. II, an enlargedtransverse section through one ot' my improved throttling-valves. Fig.III is au enlarged side View ot' the slotted links that give motionrelatively to the two throttling-valves, and Fig. IV is a perspectiveView ot' the oscillating pedal and shaft that oper ates the valves. Fig.V is a fiat View of the seat of the throttling-valve. Fig. Vl isasectional view oi the distributingvalve.

In operating dual power-hammers that act in conjunction, but alternatelyon one piece, both hands of an operator are engaged in the adjustment ofthe work and control of the dies, so pedals have to be employed forcontrolling the hammers, which as the work proceeds are frequently andrapidly changed so a forging can be completed at a single heat, and suchpedal action must' be performed with a single motion and without theoperator moving his toot therefrom. This is attained in the manner nowto be described by reference to the drawings.

1 and 2 in Fig. I represent two power-hammers to be operated by steam orair set at relative angles of ninety degrees or vertically andhorizontally.

3 is the framing to support the hammers 1 and 2, the liXed dies andother parts resting on a subbase L1.

The hamIner-heads 5 and 6, motive cylin ders 7, and distributing-valvestherefor are all of the common construction and will be understoodwithout detail description.

rIhe dies, which vary with the form-oi' work to be done, are inserted at9 in the anvil,- block 10. rIhese not being directly relevant to myinvention and of various forms are omitted from the drawings.

12 is a guide for the vertical hammer-head None is required ior thehorizontal one 6. The steam or air distributing valves at 8 for thecylinders 6 and 7 are ot' the common sliding type, as shown inFigrVI.Steam or air is admitted to the throttling-valve chamber la throughpipes 17, connecting to a boiler or an air-receiver, and passes to thecylinder 7 through the side pipes 18.

In the tl1rottling-valve chambers 11i and 15 are slide-valves 20, thatmove on perfo ated seats 22, the ports 23 being of triangular form, sothat when the slides 2O are moved to uncover this port the air or steamis admitted cumulatively, increasing with the range. A small passage 24through the seat 23 admits to the side pipes 18 a small amount of air orsteam when the port 23 is closed, which affords suflicient pressure tohold the hammer-heads and 6 in a retracted position, as hereinafterexplained. The valve-rod 25 connects the throttling-valve 2O to thepiston 27 and eX- tends into the distributing-valve chamber, where itcontacts the distributing-valve 8, and when the hammer is out of actionpushesthe said valve back, admitting steam that escapes through the port24 to the inner end of the cylinder 2. The same operation takes placewith'each one of the hammers.

The throttling-valve 20 for the horizontal hammer 2 is moved by a link30 to a stud 32, as seen in Figs. I and-II, and for the vertical hammer1 the corresponding valve-stem 25 is moved by a bell-crank 33, operatedby a link 34. The links and 34 are operated by the levers and 37,connected by a longer lever 38 and a link 39 to the oscillating shaft40, as shown at 42 in Figs. I and IV. This shaft 40 is placed near theioor in bearings 43 and is operated by a pedal 44, as indicated in Fig.IV, by the foot of the attendant. A counter- Weight 45 balances theweight of the link 39 and other parts requiring gravity compensation.

The operation is as follows: Supposing the horizontal hammer 2 is to beset in motion,'

the operator presses downward with his toe on the pedal 44. This drawsthe link 30 backward, opening the throttle-valve at 2O in a degreeproportionate to the distance moved, at. the same time withdrawing thestem 26 clear of the distributing-valve of the engine 7, so the lattermay operate in a normal manner. In this operation the link 34 remainsfixed by reason of the slot 49. When the hammers are to be stopped, theoperator releases the pedal 44 and the pistons 27 instantly bring theoscillating shaft 40 to its central or neutral position, the ends of thestems 26 bearing against the distributingvalves and determining suchneutral position. In this position the pins 47 and 48 are at the ends ofthe slots 48 and 49, as seen in Fig. III, and hammer-heads 5 and 6 areheld in a retracted position by the elastic fluid which escapes throughthe small port 24. The other throttling-valve at 14 is operated in thesame manner by the operator pressing the pedal 44 downward with hisheel, moving the links 39 and 34 and the valve-stem 25 by means of thebell-crank 33, which is introduced to change the direction of movement.

To produce independent action of the two engines and hammers and toguard against both being started at the same time, the links 30 and 34are slotted at the ends, as shown in Fig'. III, so that when either ismoved by means of the pedal 44 the pin 46 or 47 of the link not in useslides in the slot 48 or 49. This latter-described device permits acentral inert point to which the shaft 40, pedal 44, and links 30 and 34instantly return by action of the pistons 27 when the foot oftheoperator is taken from the pedal 44, both hammerheads 5 and 6 standingin their receded position.

To supply air or steam to the inner end of the cylinders 7 when thethrottle-valve 2O is closed, I provide a small hole 24 through thevalve-seat 22, as shown in Fig. V. When the throttle-valve 2O is closed,this passes enough of the fluid to fill the inner ends of the motivecylinders 7 and hold the hammerheads outward, as just described. Theport or passage 23 in the valve-seat 22 is4 made of triangular form, asshown, so that the admission of air or steam is graduated to. producelight or heavy strokes of thehammers in proportion to the distance thepedal 44 is moved. This latter is an important feature of my invention,without which the action of the hammers could not be controlled as thenature of the work demands, and reduces the operation to the same natureas if performed by hand-hammers. It will be understood that this devicefor holding the hammer-heads in a retracted position relates especiallyto the vertical hammer 1; but to have uniformity of fittings and becausethe horizontal hammer might stop in a forward position I provide likefittings for each.

I do not confine my invention to the particular valve operatingmechanism as shown in the drawings, as other equivalent gearing could beemployed to transmit motion from a pedal to the controlling-valves; but

What I do claim, and desire to secure by Letters Patent, is-

1. In a duplex power-hammer, a verticallyacting hammer, ahorizontally-acting` hammer, power mechanisms for operating said hammersseparately, power mechanisms for starting and stopping each hammerseparately, a treadle centrally pivoted to oscillate on its center, andseparate connecting means to convey the positive and negative movementsof said treadle to each of said mechanisms for starting and stopping therespective hammers, with a provision whereby said hammers may be startedand stopped separately and alternately by said oscillations, and held atrest when the treadle is in the central neutral position between theextreme oscillations, substantially as specified.

2. In a duplex power-hammer, a verticallyacting hammer, ahorizontally-acting hammer, power mechanisms for operating said hammersseparately, power mechanisms for starting and stopping each hammerseparately, a treadle centrally pivoted to oscillate on its center,separate connecting means to IOO IIO

convey the respective positive and negative movements oi' saidoscillatory treadle to each of said mechanisms for starting and stoppingthe respective hammers alternately, and a provision for lost motion,whereby the oscillations of the treadle shall operate but one oi' saidstarting and stopping mechanisms at a time and leave an inert pointbetween the eX- treme oscillations where both hammers will be held atrest until positively set in motion by the further movement of thetreadle, substantially as speciiied.

3. In a duplex power-hammer, a verticallyacting hammer, ahorizontally-acting hammer, power mechanisms Jfor operating said hammersseparately, power mechanisms for starting and stopping each hammerseparately, a treadle centrally pivoted to oscillate on its center, andseparate connecting-rods to convey the respective positive and negativemovements ot' said oscillating treadle to each of said mechanisms forstarting and stopping the respective hammers alternately, saidconnecting-rods being provided with slots in the connecting ends thereofto a'f'lord lost motion,

Awhereby the movements of the treadle shall operate bntone of the saidstarting and stop- VVILLAM XV. WORD.

VVitn esses:

P. W. J. LANDER, JAMES L. KING.

